SCP (Secure Copy Protocol)

SCP is mostly used with SSH-1. SCP is an older protocol but almost universally supported on Unix-like platforms as part of an SSH protocol suite. It is rarely supported on other platforms. SCP is a descendant of the ancient “rcp.”

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WinSCP in general cannot work against any SCP server. As a GUI client, WinSCP needs the server provide more functionality than just SCP (which can only transfer files). See requirements for more details.